Bridge existing Home Assistant entities to KNX group addresses. The integration lets you add "Ports" that bind an HA entity to KNX addresses for state updates and commands.

Current minimal scope:

Binary Sensor port (state -> KNX)
Switch port (KNX -> HA commands, HA state -> KNX)
Cover port (KNX -> HA commands, HA state -> KNX)
Light port (KNX -> HA commands, HA state -> KNX)

Requirements

Home Assistant 2025.12 or newer (tested for compatibility with 2026.2).
The built-in KNX integration must be set up and running.

Install (HACS)

Add this repository as a custom integration in HACS.
Install the integration.
Restart Home Assistant.
Add the "HA KNX Bridge" integration from the UI.

Configure

During setup, select the existing Home Assistant KNX integration entry.
Add Ports from the integration's configuration page. If the "Add Port" UI is missing, open the integration options and manage ports there (fallback for HA versions without subentry support).
Each Port shows up as a device with an enable switch for quick on/off control.

Binary Sensor Port

entity_id: the HA binary_sensor to mirror.
state_address (DPT 1): KNX group address that receives the HA state.

Cover Port

entity_id: the HA cover to control/monitor.
move_long_address (DPT 1.008 Up/Down): KNX group address for open/close commands.
stop_address (DPT 1): KNX group address for stop commands.
position_address (DPT 5.001): KNX group address for set position.
position_state_address (DPT 5.001): KNX group address that receives HA position updates.
angle_address (DPT 5.001): KNX group address for set tilt position.
angle_state_address (DPT 5.001): KNX group address that receives HA tilt updates.

If a group address is left empty, it is ignored. Group address format must be X/Y/Z (0-31/0-7/0-255) or X/Y (0-31/0-2047). Only state addresses expose an invert outgoing toggle to flip KNX payloads.

Switch Port

entity_id: the HA switch to control/monitor.
command_address (DPT 1): KNX group address for on/off commands.
state_address (DPT 1): KNX group address that receives HA on/off state.

Light Port

entity_id: the HA light to control/monitor.
light_address (DPT 1.001): KNX group address for on/off commands.
light_state_address (DPT 1.001): KNX group address that receives HA on/off state.
brightness_address (DPT 5.001): KNX group address for brightness commands.
brightness_state_address (DPT 5.001): KNX group address that receives HA brightness.
color_address (DPT 232.600): KNX group address for RGB commands.
color_state_address (DPT 232.600): KNX group address that receives HA RGB state.
rgbw_address (DPT 251.600): KNX group address for RGBW commands.
rgbw_state_address (DPT 251.600): KNX group address that receives HA RGBW state.
hue_address (DPT 5.003): KNX group address for hue commands.
hue_state_address (DPT 5.003): KNX group address that receives HA hue state.
saturation_address (DPT 5.001): KNX group address for saturation commands.
saturation_state_address (DPT 5.001): KNX group address that receives HA saturation state.
xyy_address (DPT 242.600): KNX group address for XY color commands.
xyy_state_address (DPT 242.600): KNX group address that receives HA XY color state.
color_temperature_address (DPT 5.001/7.600/9): KNX group address for color temperature commands.
color_temperature_state_address (DPT 5.001/7.600/9): KNX group address that receives HA color temperature state.
relative_color_temperature_address (DPT 3.007): KNX group address for relative color temperature steps.
color_temperature_mode: relative (DPT 5.001 percent), absolute (DPT 7.600 Kelvin), or absolute_float (DPT 9 Kelvin).
min_kelvin / max_kelvin: Kelvin range used for relative color temperature mapping.
relative_dimming_address (DPT 3.007): KNX group address for relative dimming steps.
Individual colors (DPT 1.001 + 5.001): red_*, green_*, blue_*, white_* on/off and brightness addresses with matching state addresses.

Notes:

For XY color, the bridge sends the brightness as the Y (luminance) component.
Relative dimming (DPT 3.007) maps KNX step values (control/stepcode) to small brightness_step_pct changes in Home Assistant.
For relative dimming, the bridge repeats steps until a KNX stop telegram (0 or 8) is received.
Relative color temperature (DPT 3.007) adjusts Kelvin in the same start/stop pattern.
Color temperature mode must match the KNX telegram DPT: relative for 5.001, absolute for 7.600 (2-byte unsigned), absolute_float for DPT 9 (2-byte float). The bridge sends HA color temperature using color_temp (mireds) for maximum compatibility.

Notes

For DPT 1.008 (Up/Down), the bridge treats 0 = Up/Open and 1 = Down/Close.
For DPT 5.001, values are interpreted as 0-100 percent where 0 = closed and 100 = open.
DPTs are auto-selected per address:
Binary sensor state_address: DPT 1
Switch command_address: DPT 1
Switch state_address: DPT 1
Cover move_long_address: DPT 1.008
Cover move_short_address: DPT 1.007
Cover stop_address: DPT 1
Cover position_address: DPT 5.001
Cover position_state_address: DPT 5.001
Cover angle_address: DPT 5.001
Cover angle_state_address: DPT 5.001
Light light_address / light_state_address: DPT 1.001
Light brightness_address / brightness_state_address: DPT 5.001
Light color_address / color_state_address: DPT 232.600
Light rgbw_address / rgbw_state_address: DPT 251.600
Light hue_address / hue_state_address: DPT 5.003
Light saturation_address / saturation_state_address: DPT 5.001
Light xyy_address / xyy_state_address: DPT 242.600
Light color_temperature_address / color_temperature_state_address: DPT 5.001/7.600/9
Light relative_dimming_address: DPT 3.007
Light relative_color_temperature_address: DPT 3.007
Light red_*, green_*, blue_*, white_* brightness: DPT 5.001
Light red_*, green_*, blue_*, white_* on/off: DPT 1.001

Roadmap

Optional standalone KNX connection (without requiring the HA KNX integration).
Additional entity types (sensor, climate).
Advanced DPT mapping options and inversion settings.

Versioning and Releases

Current version: 0.0.31
CHANGELOG.md lists versions with the newest entries at the top.